Operational characteristics and potential of scientific-grade charge-coupled devices in x-ray imaging applications

Andrew Karellas, Hong Liu, Lisa J. Harris, Carl J. D'Orsi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

In diagnostic imaging, primarily because of the low optical coupling efficiency and the limited sensitivity of video cameras, the use of an x-ray intensifying screen coupled to a camera by a lens is considered suboptimal. Modern electronic x ray acquisition employs image intensification in order to achieve an adequate signal for the camera at the output end of the tube. The high gain of modern intensifiers enables the acquisition of images with noise characteristics limited by the number of detected x-ray photons. However, the advent of ultra- sensitive low-noise CCDs have prompted a re-examination of non-intensified optical coupling approaches for limited applications in medical x-ray imaging where image intensifiers are not optimal. The measured characteristics of a cooled CCD system, with 2048 × 2048 pixels are presented as they apply to the requirements for some x-ray imaging applications. Measurements with a lens coupling suggest that the x-ray quantum limit may be reached in such a system after careful optimization of the components, but much better results may be attained with fiberoptic coupling. The potential merits of intensified versus non-intensified approaches are also discussed.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages85-91
Number of pages7
ISBN (Print)0819408093
StatePublished - Dec 1 1992
Externally publishedYes
EventElectron Tubes and Image Intensifiers - San Jose, CA, USA
Duration: Feb 10 1992Feb 11 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1655
ISSN (Print)0277-786X

Conference

ConferenceElectron Tubes and Image Intensifiers
CitySan Jose, CA, USA
Period2/10/922/11/92

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Karellas, A., Liu, H., Harris, L. J., & D'Orsi, C. J. (1992). Operational characteristics and potential of scientific-grade charge-coupled devices in x-ray imaging applications. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 85-91). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1655). Publ by Int Soc for Optical Engineering.